lastIndexOf() method returns the last index at which
a given element can be found in the typed array, or -1 if it is not present. The typed
array is searched backwards, starting at
fromIndex. This method has the
same algorithm as
Array.prototype.lastIndexOf(). TypedArray is
one of the typed
array types here.
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typedarray.lastIndexOf(searchElement[, fromIndex = typedarray.length])
- Element to locate in the typed array.
- Optional. The index at which to start searching backwards. Defaults to the typed array's length, i.e. the whole typed array will be searched. If the index is greater than or equal to the length of the typed array, the whole typed array will be searched. If negative, it is taken as the offset from the end of the typed array. Note that even when the index is negative, the typed array is still searched from back to front. If the calculated index is less than 0, -1 is returned, i.e. the typed array will not be searched.
The last index of the element in the array;
-1 if not found.
searchElement to elements of
the typed array using strict
equality (the same method used by the ===, or triple-equals, operator).
var uint8 = new Uint8Array([2, 5, 9, 2]); uint8.lastIndexOf(2); // 3 uint8.lastIndexOf(7); // -1 uint8.lastIndexOf(2, 3); // 3 uint8.lastIndexOf(2, 2); // 0 uint8.lastIndexOf(2, -2); // 0 uint8.lastIndexOf(2, -1); // 3
The definition of 'TypedArray.prototype.lastIndexOf' in that specification.
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